Steam-boiler.



No. 667,431. Patented Feb. 5, I90l. v

w. EsTY. STEAM BOILER.

(Application filed Jan. 20, 1900.) No Model.) I .2 Sheets-Shea* I.

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gvwentoz No. 667,43I. Patented Feb. 5, |90I. W. ESTY.

STE'AM .B0lLER.

(Application Bled Jau. 20. 1900."

2 Sheets*$'heet 2.

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Assur tries.

VILLIAM ESTY, OF LACONIA, NEN HAMPSHIRE.

STEAM-BOILER.

SPECIFICATION forming1 part of Letters Patent N 0.667,431, datedFebruary 5, 1901.

ippiicaion me@ January 20,1900. seria no. 2,131. (No model.)

To all 'LUI/Lon?. it may concern:

Be it known that I, WILLIAM ESTY, of Laconia, in the county of Belknapand State of New Hampshire, have invented a new and ImprovedSteam-Boiler, of which the following is a specification.

This invention relates to that type of steamboilers known as flashers,in which the water is fed to the boiler proportionately to the requantity of steam used, the boiler not having any water-storagecapacity, and the feed of the water and the efficacy of the heat beingdefinitely controllable in accordance with the steam-consumingrequirements of the motor i5 supplied by the boiler. ln suchflasher-boilers the boiler is maintained heated at a high tem peratu reand the feed-water is injected or otherwise introduced in smallquantities, so that the wat-er is quickly converted into steam ze and isused as fast as produced. Boilers of this type are especially` useful onself-propelled vehicles now known as automobiles, and it is importantthat the steam-generator for such vehicle shall be both safe and light.

This is of special importance,because the boilers of this type mustbecapable of withstanding a heavy pressure.

The object of the present invention is to produce a boiler of theflasher type which will 3o possess great strength and at the same timeshall be light and capable of rapidly and efiiciently converting waterinto steam.

The improved construction of boiler constituting the present inventionis illustrated in 3 5 the accompanying drawings, wherein- Figure l is aside View of the improved boiler, partly in vertical section. Fig. 2 isa plan view, partly in section, of one of the coils employed.

The boiler proper is composed of a series of superposed and connectedcoils A, which are connected together in series. The iiuid traverses theentire length of all of the coils in succession in passing from theinlet B to the outlet C. As shown and as preferred, the

inlet B communicates with the lowest coil, and the outlet C communicateswith the nppermost coil. The feed-water is introduced at the inlet inany manner which enables it 5o to be introduced in a definite andcontrollable quantity. There are many7 ways of so introducing thefeed-water now known that the illustration and description of any meansfor this purpose are here unnecessary. The outlet C leads in anyconvenient manner to the engine or motor which utilizes the steam.

Each of the several coils is arranged horizontally and is or may becoiled in the 'same manner. Fig. 2 illustrates the preferred method offorming the coil. As shown in this figure, the coil is a double spiral,the outgoing spirals alternating with the incoming spirals. Thisarrangement secures a more uniform distribution of the heat withrelation to the condition of the fluid traversing the coil. This doublespiral also possesses the further advantage t-hatthe discharge end Dthereof is at the outside of the coil, as wellas the inlet end E. Whilethis formation of the coil is preferred, it is not essential, since anyother form yof coil would suffice, such as a single spiral or a zigzagcomposed of straight sections united by either straight or curvedelbows. The several superposed coils are connected together, the outletD of each lower coil being connected directly with the inlet E of thecoil just above.

The several coils are inclosed in a suitable casing F. As shown, thebends which unite the inlets and outlets of the several coils passthrough and beyond the side Walls of the casing, thereby enabling theside walls of the casing to be brought close to the peripheries of vthecoils. The coils may be heated in any suitable manner. There areindicated in the drawings three burners G, disposed at regular intervalswit-hin the lower part of the casing and beneath the lowermost coil A.These burners may be of any form suitable for burning liquid or gaseousfuel. The manner and means for heating the boiler constitute no part ofthe present invention.

Each coil is composed of a series of connected spherical bulbs b.Preferably each coil is made from a tube of steel which is forged so asto produce the spherical bulbs connected together by narrow necks'a.Each of the coils may be made of an independent tube shaped with thebulbs, the several coils being connected together, or all of the coilsmay be made from a single tube. The spherical form of the bulbs givesgreat strength, so

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that the boiler can withstand very high pressure. At the same timeextended heatingsurface is secured.

On account of the horizontal disposition of each coil its several bulbsconstitute chambers for holding water in small separated quantities byreason of the circumstance that each bulb has a portion which extendsbelow the level of its two necks which connect it with the preceding andsucceeding bulbs, respectively. The necks ot the bulbs are successivelylarger in the several coils, being largest in the last coil and smallestin the rst coil. Consequently the necks are smallest where the waterenters and are largest near the outlet C, so that the necks formsuccessively less obstruction to the steam as it is generated. In fact,in the last portion ofthe last coil the necks may be ofthe same diameteras the bulbs themselves-that is to say, the last portion of the lastcoil may be cylindrical.

The water which is introduced into the coil is retarded along its courseby the bulbs which catch the water. As the steam is formed it passessuccessively through the necks of the several bulbs, and any watercarried with it is separated out and drops into the bottoms of thebulbs. As the steam is heated and dried, and consequently occupies morespace and moves with greater velocity, it meets with less and lessresistance to its passage by reason of the increasing size of theconnectingnecks. By the time the steam reaches the last coil it is dry,the top coil serving as a supel-heater.

I claim as my inventionl. A steam-generator composed of a succession ofcommunicating hollow bulbs arranged in series and connected together,substantially as set forth.

2. Asteam-generator composed of a succession of communicating hollowbulbs connected by necks which increase in size, being larger at theoutlet than at the inlet, substantially as set forth.

3. A steam-generator composed of a series of connecting-coils, the waterbeing introduced at one end of the series and the steam being dischargedat the other end of the series, each coil comprisinga series of communicating hollow bulbs, substantially as set forth.

4. A steam-generator composed of a series of communicating coilsconnected together so that the fluid traverses in succession all of thecoils in passing from the inlet to the outlet, each coil comprising aseries of connected hollow bulbs, the necks which connect the hollowbulbs increasing in size from the inlet to the outlet end of the seriesof coils, sub-A stantially as set forth.

5. Asteam-generator composed of a succession of communicating hollowbulbs arranged in series and connected together, the water beingintroduced at one end of the series and the steam being discharged atthe other end of the series, substantially as set forth.

In witness whereof I have hereunto signed my name in the presence of twosubscribing witnesses.

VILLIAM ESTY.

Witnesses:

GEO. W. SHERWELL, F. A. PHELPs.

